Hi everybody, Haven't been here in a while, my new project is a keypad entry with specific criteria.
1) Settable code.
2) Ability to use the same input for more than one digit.
3) Fault output to enable alarm with incorrect code entry.

I've written another ladder that uses the ADC so the keypad can get down to two wires with each switch having a distinct resistance / voltage drop but it isn't incorporated in this version.

Please bear in mind I have about six months experience so there is certainly an easier solution but I'm posting it anyway just in case someone finds it useful.
Input appreciated as always and this is an unfinished version (hence the name).
There's plenty of comments to follow along my train of thought while developing it.
Thank You to all who help with the LDMicro project, you have made so much possible.